Rock plow or scarifier



Af w. I INDGREN Rockv PLOW 0R SCARIFIER Nov. s, 1951y 21,573,977

Filed June 19; 1947 Patented Nov.Y 6, 1951 rricr.

lRooi; PLOW (ia-sommen .Albin Walter Lindgren, Goulas, F1a.

Application June 1.9, 1947, serial-Nansen 12 claims. 1

This invention is a rock plow for :scarifer adapted Vfor use in thepreparation of rocky or root embedded land for agriculturalor otheruses. In those localities where Ylandis .of rock, coral or slagformation, `the ordinary apparatus for clearing, leveling and .preparingthe land .for agricultural or other uses, are usually inefficient. Thisis Adue Yto ztheJfact that .such apparatus as has been heretoforeemployed is inadequate to cope with orbreak-up the heavy-solidformations,

`such as rock, coral and slag. The same is true where the land has treeor heavy plant .roots embedded therein. ItA has been necessary,therefore, to resort to special apparatus for treating land in thosevlocalities; where thesevconditions are found, this special apparatus-usually including heavy :machinery 'and apparatus capable of performingthe work satisfactorilygandfeciently and atfthe 'same timelin` aneconomicalmanner.

.The presentinventionisa rocki plow orscarifler designed particularlyfor use in such areas as have been referred to, and wherein the heaviermaterials, such as rock, shale or coral will be broken up and torn aparteectively and in such manner that subsequent treatments may render itsuitable for agricultural or other purposes.

An object of the invention is to provide apparatus of the character andfor the purposes stated which is of comparatively simple construction,which may be manufactured by simple processes, which involves the use ofbut few parts, which has its parts so constructed and assembled as towithstand the strains and stresses to which it must necessarily besubjected in use while at the same time performing its functionadequately,`

which is capable of such adjustments as may be necessitated in thetreatment of various types of land, and which will prove fully adequatein performing the functions for which it is designed.

Other objects and advantages will appear as the description proceeds,and with particular reference to the drawings, wherein:

Fig. l is a top plan view of a rock plow or scarier involving theinvention,

Fig. 2 is a side elevation of the plow, and

Fig. 3 is a rear elevation of the plow.

The invention involves a plow or scariler in the form of a drag to besecured by a suitable hitch to the rear of a tractor or other propellingdevice capable of drawing it over or through the land to be treated. Theplow may involve one, two, three or more drag elements as conditions mayrequire, and these elements are all constructed and assembled in suchmanner as to effectively treat or break up the heavier forma- `tionsaswell as to tear apart and remove .roots .that maybe embeddedin theland.

The plow includes two or Vmore castings allzof identical shape andconstruction and the descrip- -tion .of one will suffice forall. Theplow includes a body 5 preferablyy comprising a heavy `casting adaptedto lie flat Yupon the ground Yand to vbe `dragged thereover by thepropelling vehicle. This casting .is of V-shape .as shown in Fig. 1, the.apex of which includes an .integral upwardly and forwardly extendinghead 6 Lat the apex thereof. The rear ends fof the casting are deflectedrearwardly to provide shoulder portions 'l disposed in vparallelism withthe central ,draft .line vof the casting, these shoulders being extendedrearwardly beyond the rear extremities of the casting and having theirupper surfaces forming tables in substantially the same horizontal planeas the upper surface or the head '8. It 'will be understood, of course,vthat these castings with fthe head and Yshoulders will be relativelyheavy in order that they may possess sufficient strength to withstandthe strains and stresses incident to their use in rocky or heavily rootinfested land.

The undersurface of each of the divergent legs of the V-shaped castinghave depending therefrom scarier teeth 8 which may be fitted intosockets formed in the castingr and held securely therein by wedges $3 asshown. These teeth may be spaced apart such distances as may be foundmost desirable and may be in any number desired or required for use.

The bodies or castings are arranged preferably in pairs, one to followanother in longitudinal alignment. The head members 5 are connected `byvstraightparallel draft bars Iii of rigid construction, the rear ends ofthe bars being bolted securely as at H to the head e of the followercasting while the forepart of bars are similarly bolted as at l2' to thehead of the lead casting. The bars I0 project forwardly from the head ofthe lead casting and include a series of openings I3 arranged verticallyin the bars for the accommodation of a, pin it constituting a hitch bymeans of which the assembled castings may be attached to a draftvehicle, not shown. It will be understood that the point of connectionof the hitch with the draft bars will determine or regulate the depth tobe reached by the rock plow as it is dragged over and through the land.

The assembled bodies or castings are maintained in stabilizedrelationship by stabilizing plates I5, one disposed at each side of thecastings. These plates extend from the top surfaces of the shoulders ofthe lead casting to the corresponding shoulders of the follower casting,and bolts I6 extending through assembly plates l1 attach the stabilizingplates securely to their respective shoulders 1. These bolts arearranged in pairs upon each side of the shoulders and flush against thesame in order to obviate the possibility of side sway of one castingwith respect to the other.

In operation, the bodies or castings will be employed in such numbers asmay be vfound necessary in treatment of the land, and the hitch or draftapparatus Will be connected to the forward end of the draft bars so asto determine the depth the plow is toassume in its operation. When poweris applied to the hitch, thedraft line is through the longitudinalcenters of the castheads 6 of each casting. The stabilizing plates ibear no part of this pull, but maintain the rear ends of the castings inproper alignment and against any tendency to sway with respect to oneanother. The teeth 8 will penetrate the ground and will dig into suchrock, shale or coral as may be encountered and will also tear apartroots or other obstacles encountered as the plow advances. Suchobstacles or solid materials as may lie close to the surface of the landwill be broken and torn apart by the advancing V-shaped casting body, aSin practice the ycasting will lie well below the surface of the landbeing treated.

As has been before stated, the nature of the land to be acted upon willlargely determine the number oi castings to be employed, and while buttwo are shown in coupled relationship in this disclosure, it will beunderstood that three or more may be similarly connected Where required.

Having thus described my invention, I claim:

1. In a rock plow, a pair of castings of substantially V-shape adaptedto lie flat upon the ground one behind the other, a head projectingupwardly and forwardly from the apex of each casting, draw bars securedone on each side of and connecting the heads of each casting, a shoulderrising from each side of each casting at the rear thereof and havingtheir upper ends disposed in the same horizontal plane with the upperends of said heads, a tie plate at each side of said castings, saidplates disposed longitudinally of said castings and resting at theirends upon the shoulders thereof, and bolts securing the ends of saidplates to their respective shoulders.

2. In a rock plow, a pair of identical castings of V-shape adapted tolie at upon the ground one Abehind another and in true longitudinalalignment, a head projecting upwardly from the apex of each casting,draw bars disposed one on each side of said heads extending from one tothevother and bolted thereto to rigidly hold said castings together, ashoulder rising from each side of each lcasting at the rear end thereof,said shoulders of said castings disposed in longitudinal alignment withone another and spaced equidistant from the longitudinal center of saidcastings, and tie plates disposed longitudinally of said castings andsecured at their ends to said shoulders.

ALBIN WALTER LINDGREN.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 1,033,574 Freeman July 23, 19121,115,900 Cook Nov. 3, 1914 1,507,833 Jarmin Sept. 9, 1924 2,302,899Troup Nov. 24. 1942 2,354,560 Troup July 25, 1944

